Separating device for leased warp threads in weaving-preparing machines



Jan. 7, 1947 ME|ER 2,413,881

SEPARATING DEVICE FOR LEASED WARP THREADS IN WEAVING-PREPARING MACHINESFiled April .5, 1946 2 Sheets-Shet 1 Jan. 7, 1947. H. MEIER 2,413,331SEPARATING DEVICE FOR LEASED WARP THREADS IN WEAVING-PREPARING MACHINESFiled April 3, 1946 2 Sheets-Sheet 2 Patented Jan. 7, 1 947 THREADSCHINES- IN- WEAVING-PREPARING, MA-

Heinrich Meier, U'ster. Switzerland, assignor" to Zellweger'A. G.Apparateund Maschinen--- fabriken-Uster, U'ster,. SwitzerlandApplication. April 3, 1946,. SerialNo, 659,369 In Switzerland April12,1945

, 8 Claims. 1

My present invention relates toa device for separating leased warpthreads in weaving-preparing machines, in which, as each foremost threadis separated off, the next following thread in the series of warpthreads. is heldback.

In contradistinction. to known devices of this kind, the present devicehas a separating body capable of rocking to and fro about an axis withtwo separating fingers disposed opposite one another and with each ofwhich a depression for the reception, of a warp thread to be separatedofi is associatedv on the front: side of the separating body, aseparating arm in the form of a double wedge being disposed between thetwo separating fingers; the whole in such arrangement that, on theseparating body turning in one direction, the foremost warp thread iscaught by the separating arm, being guided over, one of the wedgesurfaces of. the latter behind the separating fingerremote from thissurface and being, released by the other separating finger, whilst, onthe separating body turning in the other direction, the next followingthread in the series of warp threads is caught by the separating arm,being, guided over the second wedge surface of the latter behind theseparating finger remote from this surface and being released by thesecond separating finger.

This permits of separating oli each warp thread reliably without injuryby means of only a single" working element; formed by the separate ingbody, that is, in a relativelysimple manner; pushers, driver tubesfitted with lease bands or similar Workin elements, such as havehitherto been in common use, being avoided. The known constructions arecomplicated and are apt to cause such heavy stresses on the warp threadsthat the latter, especially those of a delicate nature, are injured andeven break, whereby faults in the separating work and breakdowns mayoccur, and the eiliciency of the particular weaving preparing machine,for instance a warpthread tying machine, thus is reduced. Moreover,lease bands are themselves exposed to considerable wear.

A constructional example of the arrangement according tothe inventionwill now be described with reference to theaccompanying drawings-.-

Fig. 1 shows the separating body in rear view with a section through itsrotary shaft,

Figs. 2 and 3 are similar views, but with'theseparatingbody in adifferentangular position from" that: of Fig; 1, for explainin itsmanner of operation in one direction ofrotation,

Fig. 4 shows a front view of the separating body in the same angularposition as Fig; 1, Fig-{Bis aviewirom belowof F-ig; 4,"

The separating body is furnished with a substantially circular, fiatdisc I with a central driving shaft 2 which at one end is formed into athickened, cylindrical peg 3 (Fig. 5) adjoining the front sideof thedisc l and terminates in a conical point 4. The separating body by meansof the shaft 2-, is borne for rotation in a bearing 5 which is mountedon a carriage, not shown, which is slidably guided and is provided witha feeler. Thisfeeler so co-operates, in a known manner, with the warpthreads to be separated, that, when the feeler is performing its properfeeling motion, the drive of the said carriage is temporarily out in,and. the latter in consequence performs a stepby-step travelling motion,while the drive of the separating body is operating. At the other end ofthe shaft 2, a fork-shaped operating lever B is fixed, the prongs ofwhich engage on both sides of a driving bar not shown, by which, whenthe separating device is in operation, the driving lever 5 isalternately rocked out of the position shown in Fig. 4 in full linesinto the position indicated in chain-dotted lines and back again; theshaft 2 and the disc I thus being turned to and fro about their axis ina corresponding manner, The disc 1 is formed at its periphery into thetwo separating fingers 1 and S, disposed opposite one an other, betweenwhich is located the radially directed separating arm 9 which isuniformly tapered towards the periphery of the disc and ends in a point.On the side corresponding to the rear side of the disc I, the separatingarm 9 has its two longitudinal edges formed into wedge-shaped surfacesIt and II respectively. The latter are inclined oppositely with respectto one another, so that the separating arm 9 forms a double wedge; onthe front side of the disc I the separating arm 9 has its free endportion beveled off, whereby the point of the separating arm is broughtbetween the front and rear side of the disc i', as shown inFigs. 8 and10'. The wedge shaped surface Id of the separating-arm 8 faces theseparating finger I, and the wedge-shaped surface I l faces theseparating finger 8, Between each of the two wedge-shaped surfaces itand i 5 and, the adjacent separatingfin-ger I and ii respectively, thereis a guiding slot l2 and 3 respectively for'the receptionof the thread,which is open'a-tthe periphery of the disc! and i's'thus freelyaccessible. On the first side of the disc I. each of the two separatingfingers I and 8 is provided with a. depression I4 and I respectively,forming continuations at the base of the corresponding guiding slot I2and I3 respectively and being widened towards the periphery of the discI. The two separating fingers 1 and 8, due to being suitably tapered,terminate in points which lie between the front and the rear side of thedisc I. The disc I of the separating body is of symmetrical formationwith respect to the centre plane of the radial separating arm 9.

As will be seen from the drawing, the driving shaft 2 lies midwaybetween the two lease or dividing bars I6 and I I, both of the samediameter, parallel thereto, but outside the crossing point of the twogroups A and B of warp threads, and so far above the crossing point thatthe central peg 3 provided on the front side of the disc I bears lightlyon the warp threads of the groups A and B, when these come within rangeof the cylindrical part 4 of the said peg 3, in Figs. 1 and 4, theforemost thread of the group A is in th region of the depression I4 inthe disc I, associated with the guiding slot I2. Owing to thecorresponding pressure of the disc I against the warp threads to beseparated off and the tension in the threads, caused thereby, the saidforemost thread will of itself have entered into engagement with thesaid depression I4, and the separating work thus already will have beeninitiated. According to Figs. 1 and 4, the separating body occupies theone terminal position, out of which it is moved, when the separatingdevice is in operation, through a suitable rotation (the direction shownby the arrow in Figs. 1, 2 and Figs. 4, 7) into the other terminalposition shown in Figs. 3 and 9, whereupon it turns back again into whatis here assumed as the initial position. When the separating body isturned out of what is assumed in the drawings to be the position ofrest, the tensioned foremost thread of the group A, which is lying inthe said depression I4 and in the region of the guiding slot I2, will beseized by the separating arm 9 and guided by the wedge-shaped 5 surfaceIf) of the latter on to the rear side of the separating arm 9 andthereby also of the separating finger 8, being thus moved out of therotary path of the separating finger 8, as will be seen from Figs. 2, 7and 8. Consequently, the said thread passes, as shown in Figs. 3, 9 and10, out of the path of the separating finger 1 and is thereforeliberated by it, whereupon the thread under the influence of its owntension moves completely onto the rear side of the disc I andconsequently out of the rotary path of the separating finger l, The saidthread has thereby been separated out of the group A, and the separatingbody has reached its corresponding terminal position. In the latter(Figs. 3, 9), the foremost thread of the group B is in the region of theguiding slot I3 and of the depression I5 of the disc I, associated withthe corresponding separating finger 8, with which depression this threadhas of itself come into engagement, owing to its own tension. Thereuponthe separating body i turned back into the initial position according toFigs. 1, 4 and 5, the tensioned foremost thread of the group B, whichlies in the depression l5 of the disc I and in the path of the guidingslot I3, being seized by the separating arm 9 and guided by thewedge-shaped surface H thereof onto the rear side of the separating arm9 and, therefore, also of the separating finger "I, whereby it is causedto move out of the rotary path of the latter. Consequently the saidthread passes out of the path of the separating finger and is liberatedby it, whereupon the thread, under the influence of its own tension,moves completely onto the rear side of the disc I and consequently outof the rotary path of the separating finger 8, the said thread thushaving been separated out of the group B. The described working cycle isthen repeated, as long as the separating body is within reach of thewarp and the shaft 2 of the separating body is turned to and fro by thedriving lever 6.

The conical point 4, provided on the front side of the disc I, assiststhe satisfactory forward feed of the separating device transversely overthe warp, whilst the arrangement of the points of the two separatingfingers I and 8 between the front and the rear side of the disc Iassists the reliable engagement of each separating finger between theforemost thread to be separated off and the thread next following it inthe series, and the analogous arrangement or displacement of the pointof the separating arm 9 assists the separating work, as will be obvious.

As the separating device can move transversely over the warp to betreated, without the warp threads having to be out off after beingseparated, the interlacing of the warp remains, as is necessary in manyweaving preparing machines, for instance in those with stop strips to bemounted on the separated warp threads or in thread serving machines. Forsuch preparing machines, known separating devices, in which the warplease has to be destroyed each time, cannot be used. A further advantageof the described separating device is that one is enabled to worksimultaneously with several separating bodies spaced above one anotheror side by side, for instance in order to be able to separate in one andthe same operation the leased threads of two warps arranged above oneanother or vertically, such as in warp-knotting or similar machines.

What I claim and desire to secure by Letters Patent is:

1. A device for separating leased warp threads in weaving preparingmachines, in which, as each foremost thread is separated. off, the nextfollowing thread in .the series of warp threads is held back, comprisinga rockably mounted separator provided with two opposite separatingfingers and with a depression each disposed on the front side thereof,said recesses being adapted to receive a warp thread to be separatedoff, and a separating arm in the form of a double wedge disposed betweenthe two separating fingers, the whole in such arrangement that, on theseparator turning in one direction, the, foremost warp thread is caughtby the separating arm, being guided over one of the wedge surfacesthereof behind the separating finger remote from this surface and beingreleased by the other separating finger, whilst, on the separatorturning in the opposite direction, the next following thread in theseries of warp threads is caught by the separating arm, being guidedover the second wedge surface of the latter behind the separating fingerremote from this surface and being released by the second separatingfinger.

2. A device as claimed in claim 1, wherein each of the two depressionsprovided on the front side of the separator for the reception of thethread, forms a continuation at the base of a thread guiding slotdisposed between the particular separating finger and the separatingarm.

3. A device as claimed in the claim 1, wherein the separator comprises asubstantially circular,

fiat rockable disc, the said two separating fingers at its periphery,and between the latter the radially directed separating arm, the disc onits front side being provided with a conically pointed central peg.

4. A device as claimed in claim 1, wherein the radial separating arm istapered towards the periphery of the disc, and the latter is builtsymmetrical with respect to the central plane of the separating arm.- 1

5. A device as claimed in claim 1, wherein the two separating fingersand the separating arm terminate in points intermediate of the front andthe rear side of the said disc.

6. A device as claimed in claim 1, wherein the separator comprises asubstantially circular, flat rockable disc, and a conically pointedcentral peg integral with the front side of the latter;

the said conical point of the peg forming a continuation of acylindrical surface thereof.

7. A device as claimed in claim 1, wherein the axis of rotation of theseparator lies between the two lease bars provided for the warp andparallel to them, but outside the crossing point of the two groups ofwarp threads, so that the said central peg is capable of bearing againstthe warp threads of both groups.

8. A device as claimed in claim 1, wherein the separator comprises asubstantially circular, fiat rockable disc, and a conically pointedcentral peg integral with the front side of the latter; the said conicalpoint of the peg forming a continuation of a'cylindrical surfacethereof, and the said peg being integral with the driving shaft of thedisc.

HEINRICH MEIER.

